Refactor: The calculate Instance Method Is No Longer Needed

Why This Change Is Necessary
========================================================================

This helper method is useless now.

What These Changes Do To Address the Issue
========================================================================

Inline the method.

Side Effects Caused By This Change
========================================================================

None expected.

Author: jfelchner

lib/ruby-progressbar/calculators/smoothed_average.rb

@@ -33,22 +33,18 @@ def progress
     samples[1]
   end
 
-  def progress=(new_progress)
-    samples[1] = new_progress
-    calculate(absolute)
-  end
-
   def total=(_new_total); end
 
   def reset
     start(:at => samples[0])
   end
 
-  def calculate(new_value)
+  def progress=(new_progress)
+    samples[1] = new_progress
     self.projection = \
       self.class.calculate(
         @projection,
-        new_value,
+        absolute,
         strength
       )
   end

spec/lib/ruby-progressbar/calculators/smoothed_average_spec.rb

@@ -19,7 +19,7 @@ module   Calculators
     it 'resets the projection' do
       projector = SmoothedAverage.new
       projector.start
-      projector.calculate(10)
+      projector.progress = 10
 
       expect(projector.projection).not_to be_zero
 
@@ -33,7 +33,7 @@ module   Calculators
     it 'resets the projection' do
       projector = SmoothedAverage.new
       projector.start
-      projector.calculate(10)
+      projector.progress = 10
 
       expect(projector.projection).not_to be_zero